How is Gistemp calculated?

How is Gistemp calculated?

In the GISTEMP index, the tables of zonal, global, hemispheric means are computed by combining the 100 subbox series for each box of the equal area grid, then combining those to get 8 zonal mean series, finally from those we get the Northern (23.6-90ºN), Southern and tropical means, always using the same method.

What does HadCRUT4 stand for?

HadCRUT4 is a gridded dataset of global historical surface temperature anomalies relative to a 1961-1990 reference period.

What is Crutem?

CRUTEM is a dataset derived from air temperatures near to the land surface recorded at weather stations across all continents of Earth. It has been developed and maintained by the Climatic Research Unit since the early 1980s, with funding provided mostly by the US Department of Energy.

What is the global temperature anomaly?

The annual anomaly of the global average surface temperature in 2021 (i.e. the average of the near-surface air temperature over land and the SST) was +0.22°C above the 1991-2020 average (+0.77°C above the 20th century average), and was the 6th warmest since 1891.

Who collects Gistemp data?

NASA Goddard Institute for Space Studies. Dataset accessed 20YY-MM-DD at https://data.giss.nasa.gov/gistemp/.

What does Gistemp show?

NASA Goddard’s Global Surface Temperature Analysis (GISTEMP) combines land surface air temperatures primarily from the GHCN-M version 4 with SSTs of the ERSSTv5 analysis into a comprehensive global surface temperature data set spanning 1880 to the present at monthly resolution, on a 2×2 degree latitude-longitude grid.

What is the current trend in temperature anomalies?

La Niña has developed and is expected to last into early 2022. Despite the cooling influence of this naturally occurring climate phenomenon, temperatures in many parts of the world are above average.

What is temperature anomaly on a graph?

An anomaly value is the difference between an individual value and the baseline. In the Global Temperature 2019 graph, the baseline is chosen to be the average of the global temperatures from 1951 to 1980. The anomaly values are the difference between each year’s global temperature in degrees Celsius and the baseline.

What does Gistemp stand for?

NASA Goddard’s Global Surface Temperature Analysis
NASA Goddard’s Global Surface Temperature Analysis (GISTEMP) combines land surface air temperatures primarily from the GHCN-M version 4 with SSTs of the ERSSTv5 analysis into a comprehensive global surface temperature data set spanning 1880 to the present at monthly resolution, on a 2×2 degree latitude-longitude grid.

What does Goddard Institute for Space Studies do?

NASA’s Goddard Institute for Space Studies, part of the Goddard Space Flight Center of the National Aeronautics and Space Administration (NASA), conducts theoretical and experimental research in astrophysics, planetary atmospheres, and climate.

What’s the biggest temperature swing?

From cold to warm A downslope chinook wind event pushed the temperature at the town of Loma from -54°F at 9 am on January 14, 1972, to 49°F by 8 am on January 15th. The 103°F (57.2°C) rise is the greatest change in temperature ever officially measured on earth within a 24-hour period.

What are the statistics of climate change 2021?

This annual temperature data makes up the global temperature record – which tells scientists the planet is warming. According to NASA’s temperature record, Earth in 2021 was about 1.9 degrees Fahrenheit (or about 1.1 degrees Celsius) warmer than the late 19th century average, the start of the industrial revolution.